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# Build
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## 'make clean' needs after changing config.h
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To build with new **config.h** you need
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$ make clean
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## WINAVR is obsolete
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It is no longer recommended and may cause some problem.
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See [Issue #99](https://github.com/tmk/tmk_keyboard/issues/99).
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# Degug Console
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## hid_listen can't find device
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When debug console of your device is not ready you will see like this:
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Waiting for device:.........
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once the device is pluged in then *hid_listen* finds it you will get this message:
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Waiting for new device:.........................
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Listening:
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Check if you can't get this 'Listening:' message:
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- build with `CONSOLE_ENABLE=yes` in **Makefile**.
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## Can't get message from console
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Check:
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- connect the device to *hid_listen*. See above.
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- push **LShift+RShift+d** to enable debug. See [Magic Commands](https://github.com/tmk/tmk_keyboard#magic-commands).
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- set `debug_enable=yes` usually in `matrix_init()` in **matrix.c**.
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- try using 'print' function instead of debug print. See **common/print.h**.
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- disconnect other devices with console function. See [Issue #97](https://github.com/tmk/tmk_keyboard/issues/97).
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***
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# Miscellaneous
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## NKRO Doesn't work
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Build with this option of Makefile
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NKRO_ENABLE = yes
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And use `Magic` command **N** to toggle NKRO feature.
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At this time NKRO is not used by default even if it is build with `NKRO_ENABLE`, you still need the `Magic`.
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To turn on NKRO by default see this fix.
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https://github.com/shayneholmes/tmk_keyboard/commit/b8375a0
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```
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--- a/common/host.c
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+++ b/common/host.c
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@@ -24,7 +24,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifdef NKRO_ENABLE
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-bool keyboard_nkro = false;
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+bool keyboard_nkro = true;
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#endif
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static host_driver_t *driver;
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```
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## TrackPoint needs reset circuit(PS/2 mouse support)
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Without reset circuit you will have inconsistent reuslt due to improper initialize of the hardware. See circuit schematic of TPM754.
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- http://geekhack.org/index.php?topic=50176.msg1127447#msg1127447
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- http://www.mikrocontroller.net/attachment/52583/tpm754.pdf
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## Can't read comlumn of matrix beyond 16
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Use `1UL<<16` intead of `1<<16` in `read_cols()` in **matrix.h** when your columns goes beyond 16.
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In C `1` means one of int type which is 16bit in case of AVR so you can't shift left more than 15. You will get unexpected `0` when you say `1<<16`.
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http://deskthority.net/workshop-f7/rebuilding-and-redesigning-a-classic-thinkpad-keyboard-t6181-60.html#p146279
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